低强度超声辐照对厌氧污泥性能的影响  

Influence of Low Intensity Ultrasonic Irradiation on Performance of Anaerobic Sludge

作　　者：朱易春[1,2] 李欣[1] 杜茂安[1] 刘祖文[2] 冯秀娟[2] 张超[2] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090 [2]江西理工大学建筑与测绘工程学院,江西赣州341000

出　　处：《中国给水排水》2015年第21期25-29,共5页China Water & Wastewater

基　　金：国家自然科学基金资助项目(51364015;51464016);江西理工大学重点基金资助项目(NSFJ2015-K04)

摘　　要：为进一步揭示超声强化厌氧微生物活性的作用机制,在超声频率为20 k Hz、声能密度为0.1 W/m L、辐照时间为10 min的条件下进行污泥辐照试验。采用超声与对照污泥沉降试验、超声过程测定污泥表面Zeta电位、激光粒度仪测定超声辐照前后的污泥粒径以及扫描电镜观察超声前后污泥絮体结构变化,探讨超声辐照对污泥相关性能的影响。结果表明,厌氧污泥经过超声作用后表面性质发生了较大的变化,低强度超声辐照导致絮体分散,增大了固液接触面积,起到了强化传质和提高污水生物处理效率的作用。In order to further reveal the mechanism for ultrasonically enhanced bio-activity of anaerobic sludge, experiments for irradiation of anaerobic sludge were carried out when ultrasonic frequency, power density and ultrasonic irradiation period were 20 kHz, 0.1 W/mL and 10 min, respectively. The influence of ultrasonic irradiation on the performance of anaerobic sludge was investigated by comparing the change of sludge settleability with and without ultrasound, measuring Zeta potential of sludge surface during ultrasonic irradiation, measuring sludge particle size before and after ultrasonic irradiation by laser particle analyzer and observing the changes in floc structure before and after ultrasonic irradiation by scanning electron microscope. The results showed that the surface properties of anaerobic sludge were significantly changed by ultrasonic irradiation with low intensity, which resulted in floc dispersion, the in- creasing of solid-liquid contact area, the enhancement of mass transfer and the improvement of biological wastewater treatment efficiency.

关 键 词：厌氧污泥 超声辐照 絮体结构 ZETA电位 污泥粒径 

分 类 号：X703[环境科学与工程—环境工程]